The solubilities of carbonates decrease down | vedclass

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(B) The solubility of alkaline earth metal carbonates decreases down the group. This is because the hydration energy of the cation decreases more rapi

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Hydration energies of cations

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(B) The solubility of alkaline earth metal carbonates decreases down the group. This is because the hydration energy of the cation decreases more rapidly than the lattice energy as the size of the cation increases down the group. Since the hydration energy is not sufficient to overcome the lattice energy,the solubility decreases. Therefore,the correct option is $(b)$.

The solubilities of carbonates decrease down the magnesium group (Group $2$) due to a decrease in:

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